{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["material", "process characterization", "application", "manufacturing standard", "machine or equipment", "engineering feature"], "input": "Elemental Mg is easily evaporated or burnt during welding or wire + arc additive manufacturing ( WAAM ) , and results in a fluctuation of the composition and mechanical performances ."}
{"material": ["Mg"], "process characterization": [], "application": ["mechanical"], "manufacturing standard": [], "machine or equipment": [], "engineering feature": []}